Cowardice is a trait wherein excessive fear prevents an individual from taking a risk or facing danger. It is the opposite of courage. As a label, "cowardice" indicates a failure of character in the face of a challenge. One who succumbs to cowardice is known as a coward.
The Cowardly Lion, from The Wonderful Wizard of Oz
Courage is the choice and willingness to confront agony, pain, danger, uncertainty, or intimidation. Valor is courage or bravery, especially in battle.
God Speed by Edmund Leighton
Plato, Musei Capitolini